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(No Model.) H SI LOOKWOOD. I

KEY. I N0. 600,618. Patented Mar. 15,1898.

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WITNESSES INVENTOR Chm/T THE NORRIS PEYERS co. vnu'raumq, wnsmuc'rou, n cy ATENT OFFICE.

HENRY S. LOCIUVOOD, OF SOUTH NORWALK, CONNECTICUT.

KEY.

SPECIFICATION forming part of Letters Patent N 0. 600,618, dated March 15, 1898.

Application filed October 11, 1897. Serial No. 654,746. (No model.)

To all whom it may concern.-

Be it known that L'HENRY S. LooKWooD,

a citizen of the United States, residing-at South Norwalk, in the county of Fairfield and State of Connecticut,have invented certain new and useful Improvements in Keys; and I do hereby declare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to the manufacture of the class of keys known as barrel-keysthat is, keys whose stems are rounded contiguous to the bit wholly from sheet metal; and my invention consists in a novel key of this class and in the method of making the same.

In the accompanying drawings, forming part of this specification, Figure 1 is a view of the barrel-blank as it is punched from sheet metal; Fig. 2, a similar view illustrating the second operation upon the barrelblank,whioh is performed by dies; Fig. 3, a similar view illustrating the third operation,'likewise performed by dies; Fig. 4, a view of the key blank properthat is, the .blank from which the entire stem, the bit, and the bow of the key are formedas it is punched from sheet metal; Fig. 5, a similar View illustrating the second operation, which consists of an operation by dies, which rounds the end of the stem; Fig. 6, a similar view illustrating the key-blank with the barrel-piece rolled upon it ready to be finished, and Fig. 7 is an end view corresponding with Fig. 6.

The key as completed in Figs. 6 and 7 may be finished by dies or in any ordinary or preferred manner and then nickeled, as usual, the finishing of the key not being of the essence of my present invention.

A denotes the key-blank, and B the barrelblank. The key-blank consists of the usual bit a, the stem 1), and the bow c. The narrowest portion of the stem is the portion contiguous to the bit and is indicated by 1. At

the extreme outer end of the stem is a widened portion 2, and between the narrow portion 1 and the main portion of the stem is a portion 3, which is wider than the narrow portion and narrower than the wide portion, as is clearly .the key-blank, shaped as in Fig. 5.

7) on opposite sides of portion 5, with a still wider portion 8 contiguous to portion 7, and at the end, contiguous to portion 8, with two rounded projections 9, having between them a rounded recess 10.

Before assembling it is necessary that the two blanks be formed as in Figs. 3 and 5-- that is to say, the barrel-blank has two additional, operations performed upon it, as indicated in Figs. 2 and 3. The second operation consists in rounding the sides and the recessed end of the blank in dies and also in striking up a raised band 12, as clearly shown in Fig. 2, and the third operation consists in folding the blank longitudinally, the line of receive the key-blank, and the key-blank has one operation performed upon it, as indicated in Fig. 5, this operation being simply the forming of a rounded end 11 at the end of the stem, said rounded end being formed fromthe metal of the widened outer end 2, which is part of the blank, as clearly shown in Fig. 4.

The operation of assembling consists in rolling the barrel-blank, shaped as in Fig. 3, about When the parts are placed in position for the final operation, the base of rounded recess 10 of the barrel-b1ank rests against shoulder at on the key-blank. It will readily be understood now by comparing Fig. 1 with Fig. 6 that in the completed key portion 6 of the barrelblank completely incloses the portion of the stem beyond the bit, the edges of portion 6 meeting closely together in the finished key. Portion 5 of the barrel-blank forms the portion of the barrel which corresponds with. the bit, the length of portion 5 being identical with the length of the bit and shoulders 13 which lies between the bit and an enlargementor collar 14, the edges of portion 7 meeting at one side of the bit precisely as the edges of portion 6 meet at the other side of the bit. Portion 8 of the barrel-blank, from which is formed raised band 12, as clearly shown in Fig. 2, forms in the completed key the enlargement or collar 14. (Shown in Figs. 6 and 7.) This enlargement or collar in the completed key is supported internally on opposite sides, owing to the fact that it is formed upon portion 3 of the key-blank. The edges of portion 8 meet closely, so that the completed collar is round and smooth and simply requires finishing, which may be performed in any ordinary or preferred manner. The rounded projections 9 in the completed key form inclines 15, which extend down from collar 14 and run out on opposite sides of the stem.

Having thus described my invention, I claim 1. A key consisting of a stem, bit and bow blanked out in a single piece and a barrelblank having a relatively narrow portion 5 with wider portions 6 and '7 on opposite sides thereof and a portion 8 having rounded proj ections 9,said barrel-blank being rolled about the end of the stem, the edges of portion 5 meeting the bit and the edges of portions 6 and 7 meeting on opposite sides of the bit and portion 8 and the rounded projections forming the collar and inclines of the completed key.

2. A key comprising a bit, stem and bow blanked from sheet metal, said blank having a widened outer end 2 to form a rounded end 11 and a portion 3 terminating in shoulders 4 and a barrel-blank having rounded projections 9 and a rounded recess 10, said barrelblank being rolled about the end of the stem, the base of recess 10 engaging one of the shoulders and the rounded projections forming inclines which run out in the sides of the stem. 3. A key consisting of a blank comprising a bit, stem and bow and having a widened outer end to form a rounded end 11 and a recess 3 terminating in shoulders 2L and a barrelblank adapted to be rolled around the end of the stem and having portions 6 and 7, the edges of which are adapted to meet at the ends of the bit, a portion 5 the edges of which are adapted to engage the opposite sides of the bit, and a portion 8 from which a collar is formed and rounded projections 9 which form inclines leading down from the collar and running out on the sides of the stem.

In testimony whereof I affix my signature in presence of two witnesses.

HENRY S. LOCKWOOD.

Witnesses:

L. D. AINSWORTH, S. E. BonwELL. 

